Re: ORTA

[David Johnson <trainman@ozemail.com.au>]

Tezza wrote:

> "Dave Proctor" <daproc@spambait.ozemail.com.au> wrote in message
> > "avachat" <avachat@dingoblue.net.au> wrote in message
> > > No disresprct to you KB but the last thing any rail or bus worker
> > > needs is for their or ORTA radio frequencies published so as
> > > hoax radio messages can make their work environment
> > > less safer than it is now.
> >
> > Why? Any safety critical messages would be passed via secure radio, and
> only
> > non-critical stuff would be passed via non-secure radio. This is why
> > authority to pass signals at stop cannot be given via radio but only by
> > telephone (although not sure if the new radio system allows for this).
>
> Verbal authority to pass a signal at stop can be given over the Cityrail
> radio.

Which is not encrypted, but consists of a data burst to identify the caller.

--
David Johnson
trainman@ozemail.com.au
http://www.ozemail.com.au/~trainman/
------------------------------------
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C.O.W.S. Page 11.